#psumcemc

[portlandstateresearch]

Jun Jiao, Mechanical and Materials Engineering faculty member, co-authored “High-Performance Self-Powered UV Detector Based on SnO2-TiO2 Nanomace Arrays,” published in the April 2018 issue of Nanoscale Research Letters.

Abstract: Photoelectrochemical cell-typed self-powered UV detectors have attracted intensive research interest due to their low cost, simple fabrication process, and fast response. In this paper, SnO2-TiO2 nanomace arrays composed of SnO2 nanotube trunk and TiO2 nanobranches were prepared using soft chemical methods, and an environment-friendly self-powered UV photodetector using this nanostructure as the photoanode was assembled. Due to the synergistic effect of greatly accelerated electron-hole separation, enhanced surface area, and reduced charge recombination provided by SnO2-TiO2 nanomace array, the nanostructured detector displays an excellent performance over that based on bare SnO2 arrays. The impact of the growing time of TiO2 branches on the performance of UV photodetector was systematically studied. The device based on optimized SnO2-TiO2 nanomace arrays exhibits a high responsivity of 0.145 A/W at 365 nm, a fast rising time of 0.037 s, and a decay time of 0.015 s, as well as excellent spectral selectivity. This self-powered photodetector is a promising candidate for high-sensitivity, high-speed UV-detecting application.

[portlandstateresearch]

Among the Maseeh College of Engineering and Computer Science signature offerings, the Undergraduate Research and Mentoring Program (URMP) funds paid undergraduate research opportunities for students majoring in all Maseeh College undergraduate disciplines: Civil Engineering, Computer Science, Computer Engineering, Electrical Engineering, Environmental Engineering, and Mechanical Engineering. Additional opportunities may be available to students majoring in Chemistry and Physics. This program is supported by a grant from the Semiconductor Research Corporation (SRC) Education Alliance (https://www.src.org/program/srcea) and by MCECS Dean's office funds. For this year's Fall-Spring cohort, the program received 29 applications. A diverse committee reviewed and ranked all applications. 18 outstanding undergraduate students were selected.